Problem 4.4a. Produce a BVP for the Laplace equation, describing the equilibrium heat distribution in a thin square block 0 ≤ 1, y ≤ L [m], with isolated square sides. Denote the temperature of every point of the block by u(x, y) [°C). The sides of the block are maintained at the following temperatures: the sides r=L, y = 0, and y L, at u= 0°C. The side r = 0, = at temperature u = {1/100 USL/2, [°C]. Provide a sketch. L/100-y/100, L/2

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